Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ef2178cc3f728e…

MALICIOUS

PDF

151.2 KB Created: 2021-03-15 07:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ea1fff4ebb00d0325a6d68cd04c3ec5b SHA-1: 111cacc12b1aef8e06428ac8c7c0a2446a851e3d SHA-256: 11ef2178cc3f728e0c0240e245981a50e73abd07bfb28e017e3ea30fa1a8a122
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it for a fake award. No scripts were extracted, but the PDF structure itself facilitated the malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/award?keyword=ahmedabad+city+pdf PDF link annotation
    • http://sujuvajilip.iblogger.org/nazanusodipetojoxefora.pdfIn PDF document text
    • http://lupupive.22web.org/nero_6_serial_number_for_windows_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/lepunurituvisiv.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/723865181.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/calvin_klein_combed_cotton_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/avon_catalogue_october_2019.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_688b69e767d74c4f80b3cd070b3e6d50.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_eeb033401fd74ec59c6c7e6159b5fa59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/fmovies._se_movies.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_05930299f0384ecdae9667b355a72612.pdf?index=trueIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_01e9e3fbb6cc4b7788f756692fe5f34e.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_179915ec0dc248f3ab394f3f5a6b2f19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pomaxa/chrome_android_taskbar_bottom.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/kasevuguxovig.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/cache_cleaner_du_speed_booster.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_9273751900ed4b11aa9b5b0806b2713b.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E577 5320 bytes
SHA-256: 887a3f38a3d8f9aa311f0e3a22957a514e75bd0112a3cc5bb469dc723d87dbb7
font_01_sfnt_off0001f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F773 6208 bytes
SHA-256: 7da298386b4f45ce34d4a11005f77665a96aca8fff6b1a365e3cb550517360bb
font_02_sfnt_off00020b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B51 14308 bytes
SHA-256: 4959dfc9059e4e5c0485426df6dc74d3f3f3e0431a010ec92be4b2552f4b3ecd
font_03_sfnt_off000239c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239C9 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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